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by krschultz 4190 days ago
RubySpec is nothing more than Ruby code doing things that worked in the previous version. Whenever it breaks, that is a regression in MRI.

Arguably it's no different than something breaking in your current Ruby program, and after spending a bunch of time debugging you realize it is a problem in MRI. If that happens, you would file a bug against MRI. RubySpec just makes it more apparent.